[Bug 769116] New: Build failure with -O3 in Ubuntu 16.04

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=769116

            Bug ID: 769116
           Summary: Build failure with -O3 in Ubuntu 16.04
    Classification: Platform
           Product: GStreamer
           Version: 1.9.1
                OS: Linux
            Status: NEW
          Severity: major
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: n770galaxy at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

gst-plugins-bad/siddec fail to build with master and 1.9.1 when -O3 is turned
on.

$ make V=1 CXXFLAGS="-O3"
/bin/bash ../../libtool  --tag=CXX --tag=disable-static  --mode=compile g++
-DHAVE_CONFIG_H -I. -I../..    -pthread -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs
-I/home/jep/gst/master/gst-plugins-base/gst-libs -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread
-I/home/jep/gst/master/gstreamer/libs -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I../../gst-libs -I../../gst-libs
-pthread -I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include 
-DG_THREADS_MANDATORY -DG_DISABLE_DEPRECATED -Wall -Wmissing-declarations
-Wredundant-decls -Wwrite-strings -Wformat-nonliteral -Wformat-security
-Winit-self -Wmissing-include-dirs -Waddress -Waggregate-return -Wno-multichar
-Werror -Wno-non-virtual-dtor  -g   -DGST_DISABLE_DEPRECATED  -O3 -MT
libgstsid_la-gstsiddec.lo -MD -MP -MF .deps/libgstsid_la-gstsiddec.Tpo -c -o
libgstsid_la-gstsiddec.lo `test -f 'gstsiddec.cc' || echo './'`gstsiddec.cc
libtool: compile:  g++ -DHAVE_CONFIG_H -I. -I../.. -pthread
-I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/home/jep/gst/master/gst-plugins-base/gst-libs -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -pthread
-I/home/jep/gst/master/gstreamer/libs -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs -I/home/jep/gst/master/gstreamer
-I/home/jep/gst/master/gstreamer/libs -I/usr/include/glib-2.0
-I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I../../gst-libs -I../../gst-libs
-pthread -I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/home/jep/gst/master/gstreamer -I/home/jep/gst/master/gstreamer/libs
-I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include
-DG_THREADS_MANDATORY -DG_DISABLE_DEPRECATED -Wall -Wmissing-declarations
-Wredundant-decls -Wwrite-strings -Wformat-nonliteral -Wformat-security
-Winit-self -Wmissing-include-dirs -Waddress -Waggregate-return -Wno-multichar
-Werror -Wno-non-virtual-dtor -g -DGST_DISABLE_DEPRECATED -O3 -MT
libgstsid_la-gstsiddec.lo -MD -MP -MF .deps/libgstsid_la-gstsiddec.Tpo -c
gstsiddec.cc  -fPIC -DPIC -o .libs/libgstsid_la-gstsiddec.o
gstsiddec.cc: In function ‘void play_loop(GstPad*)’:
gstsiddec.cc:428:38: error: ‘value’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
   GST_BUFFER_OFFSET_END (out) = value;
                                      ^
gstsiddec.cc:433:37: error: ‘time’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
   GST_BUFFER_DURATION (out) = value - time;
                                     ^
gstsiddec.cc:413:35: error: ‘offset’ may be used uninitialized in this function
[-Werror=maybe-uninitialized]
   GST_BUFFER_OFFSET (out) = offset;
                                   ^
cc1plus: all warnings being treated as errors
Makefile:622: recipe for target 'libgstsid_la-gstsiddec.lo' failed
make: *** [libgstsid_la-gstsiddec.lo] Error 1

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